Kedu ka isi nke hydroxypropyl methylcellulose (HPMC) si emetụta àgwà ya?

Otu esi achọpụta ogo hydroxypropyl methylcellulose (HPMC) bụ ajụjụ na-echegbu ọtụtụ ndị ahịa na ndị enyi. Taa, Xinhe Shanda Cellulose na-achikota otu esi ekpe ikpe nke hydroxypropyl methylcellulose (HPMC) Na-ekpebi àgwà ngwaahịa:

Nke mbụ, anyị kwesịrị ịghọta usoro mmepụta nke hydroxypropyl methylcellulose:

Hydroxypropyl methylcellulose, nke a makwaara dị ka hypromellose nacellulose hydroxypropyl methyl ether, bụ nke ukwuu dị ọcha cellulose owu dị ka akụrụngwa, nke na-pụrụ iche etherified n'okpuru alkaline ọnọdụ.

Ngwakọta nke hydroxypropyl methylcellulose: na-emeso cellulose owu a nụchara anụcha na lye na 35-40 Celsius C maka ọkara otu awa, pịa ya, gwepịa cellulose ahụ, wee mee ya nke ọma na 35 ° C iji mee ka ogo nke polymerization nke alkali nwetara. eriri n'ime oke achọrọ. Tinye eriri alkali n'ime kettle etherification, tinye propylene oxide na methyl chloride n'usoro, na etherify na 50-80 Celsius maka awa 5, nrụgide kachasị bụ ihe dịka 1.8MPa. Mgbe ahụ tinye ego kwesịrị ekwesị nke hydrochloric acid na oxalic acid na mmiri ọkụ na 90 Celsius C iji sachaa ihe iji gbasaa olu. Wepu mmiri n'ime centrifuge. Na-asa ahụ ruo mgbe na-anọpụ iche, na mgbe mmiri dị n'ime ihe ahụ dị ala karịa 60%, kpoo ya na ikuku na-ekpo ọkụ na 130 ° C na ọdịnaya nke na-erughị 5%.

HPMC mepụtara site na usoro mgbaze na-eji toluene na isopropanol dị ka ihe mgbaze. Ọ bụrụ na ịsa ahụ adịghị mma, a ga-enwe isi ísì ọjọọ. Nke a bụ nsogbu na usoro ịsa ahụ, ọ dịghịkwa emetụta ojiji na enweghị nsogbu, ma n'eziokwu, hydroxypropyl methylcellulose nke ọtụtụ ndị na-emepụta na-emepụta nwere isi ísì siri ike na isi ísì. Àgwà nke ụdị a bụ n'ezie ọ bụghị ruo ọkọlọtọ.

Hypromellose bụ owu a nụchara anụcha nke etinyere ya na mmiri mmiri na-adịghị ahụkebe iji nweta alkaline cellulose, wee gbakwunye ihe mgbaze, onye na-ahụ maka etherification, toluene, na isopropanol maka mmeghachi omume etherification, wee nweta ngwaahịa emechara mgbe ọ kwụsịrị, ịsa, ihicha, na ihie. Ọ dịghị mma, ọ ga-esi ísì, ya mere ndị ọrụ nwere ike iji ya mee ihe na obi ike.